[ 50.548150][ T26] audit: type=1800 audit(1581931836.075:27): pid=7866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 50.594326][ T26] audit: type=1800 audit(1581931836.185:28): pid=7866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 51.431382][ T26] audit: type=1800 audit(1581931837.015:29): pid=7866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 51.451751][ T26] audit: type=1800 audit(1581931837.025:30): pid=7866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.33' (ECDSA) to the list of known hosts. 2020/02/17 09:30:46 fuzzer started 2020/02/17 09:30:48 dialing manager at 10.128.0.105:44155 2020/02/17 09:30:48 syscalls: 2909 2020/02/17 09:30:48 code coverage: enabled 2020/02/17 09:30:48 comparison tracing: enabled 2020/02/17 09:30:48 extra coverage: enabled 2020/02/17 09:30:48 setuid sandbox: enabled 2020/02/17 09:30:48 namespace sandbox: enabled 2020/02/17 09:30:48 Android sandbox: /sys/fs/selinux/policy does not exist 2020/02/17 09:30:48 fault injection: enabled 2020/02/17 09:30:48 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/02/17 09:30:48 net packet injection: enabled 2020/02/17 09:30:48 net device setup: enabled 2020/02/17 09:30:48 concurrency sanitizer: enabled 2020/02/17 09:30:48 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 65.250831][ T8034] KCSAN: could not find function: 'poll_schedule_timeout' [ 66.675879][ T8034] KCSAN: could not find function: '_find_next_bit' 2020/02/17 09:30:55 adding functions to KCSAN blacklist: 'vm_area_dup' 'sit_tunnel_xmit' 'blk_mq_get_request' 'generic_write_end' 'pcpu_alloc' '__add_to_page_cache_locked' 'copy_process' 'ext4_has_free_clusters' 'attach_to_pi_owner' 'dd_has_work' 'ktime_get_real_seconds' 'wbt_done' 'ktime_get_seconds' '__filemap_fdatawrite_range' 'kcm_rfree' 'poll_schedule_timeout' '__ext4_new_inode' 'atime_needs_update' 'mod_timer' 'do_nanosleep' 'add_timer' '__delete_from_page_cache' 'find_get_pages_range_tag' 'generic_file_read_iter' 'shmem_getpage_gfp' 'run_timer_softirq' '_find_next_bit' 'kauditd_thread' 'pipe_double_lock' 'do_syslog' 'tomoyo_domain_quota_is_ok' 'wbt_issue' 'echo_char' 'ext4_nonda_switch' 'audit_log_start' 'do_exit' 'shmem_add_to_page_cache' 'exit_signals' 'blk_mq_sched_dispatch_requests' 'blk_mq_dispatch_rq_list' 'tick_nohz_idle_stop_tick' '__rb_rotate_set_parents' '__find_get_block' 'yama_ptracer_del' 'ext4_free_inodes_count' 'n_tty_receive_buf_common' 'generic_fillattr' 'wbt_inflight_cb' 'ext4_mark_iloc_dirty' 'ep_poll' 'tick_sched_do_timer' 'xas_find_marked' 'ext4_writepages' 'xas_clear_mark' [ 117.951429][ C1] ================================================================== [ 117.959546][ C1] BUG: KCSAN: data-race in ktime_get / timekeeping_advance [ 117.966793][ C1] [ 117.969119][ C1] write to 0xffffffff8622f2c8 of 280 bytes by interrupt on cpu 0: [ 117.976925][ C1] timekeeping_advance+0x88e/0xd80 [ 117.982556][ C1] update_wall_time+0x19/0x20 [ 117.987227][ C1] tick_do_update_jiffies64+0x1ef/0x2b0 [ 117.992765][ C1] tick_sched_do_timer+0xd4/0xe0 [ 117.997751][ C1] tick_sched_timer+0x43/0xe0 [ 118.002444][ C1] __hrtimer_run_queues+0x274/0x5f0 [ 118.007632][ C1] hrtimer_interrupt+0x22a/0x480 [ 118.012561][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 118.018009][ C1] apic_timer_interrupt+0xf/0x20 [ 118.022921][ C1] [ 118.025240][ C1] read to 0xffffffff8622f2e8 of 8 bytes by interrupt on cpu 1: [ 118.032763][ C1] ktime_get+0x11c/0x210 [ 118.036987][ C1] tcp_mstamp_refresh+0x1d/0x70 [ 118.041826][ C1] tcp_rcv_established+0x7c/0xf50 [ 118.046841][ C1] tcp_v4_do_rcv+0x3b5/0x520 [ 118.051417][ C1] tcp_v4_rcv+0x1c30/0x1e20 [ 118.055908][ C1] ip_protocol_deliver_rcu+0x4d/0x420 [ 118.061260][ C1] ip_local_deliver_finish+0x110/0x140 [ 118.066705][ C1] ip_local_deliver+0x133/0x210 [ 118.071541][ C1] ip_sublist_rcv_finish+0xf8/0x140 [ 118.076724][ C1] ip_sublist_rcv+0x418/0x550 [ 118.081387][ C1] ip_list_rcv+0x2f5/0x322 [ 118.085794][ C1] __netif_receive_skb_list_core+0x350/0x5c0 [ 118.091758][ C1] netif_receive_skb_list_internal+0x5d8/0x830 [ 118.097893][ C1] gro_normal_list.part.0+0x3a/0xb0 [ 118.103074][ C1] gro_normal_one+0x162/0x170 [ 118.108443][ C1] napi_gro_receive+0x288/0x300 [ 118.113279][ C1] receive_buf+0x284/0x30d0 [ 118.117768][ C1] virtnet_poll+0x436/0x7d0 [ 118.122262][ C1] net_rx_action+0x3ae/0xa90 [ 118.126853][ C1] __do_softirq+0x115/0x33f [ 118.131343][ C1] run_ksoftirqd+0x46/0x60 [ 118.135759][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 118.140676][ C1] kthread+0x1d4/0x200 [ 118.144725][ C1] ret_from_fork+0x1f/0x30 [ 118.149112][ C1] [ 118.151421][ C1] Reported by Kernel Concurrency Sanitizer on: [ 118.157557][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.6.0-rc1-syzkaller #0 [ 118.165680][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.175711][ C1] ================================================================== [ 118.183749][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 118.190421][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.6.0-rc1-syzkaller #0 [ 118.198547][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.208664][ C1] Call Trace: [ 118.211943][ C1] dump_stack+0x11d/0x181 [ 118.216262][ C1] panic+0x210/0x640 [ 118.220165][ C1] ? vprintk_func+0x8d/0x140 [ 118.224746][ C1] kcsan_report.cold+0xc/0x1a [ 118.230338][ C1] kcsan_setup_watchpoint+0x3a3/0x3e0 [ 118.235709][ C1] __tsan_read8+0xc6/0x100 [ 118.240127][ C1] ktime_get+0x11c/0x210 [ 118.244363][ C1] tcp_mstamp_refresh+0x1d/0x70 [ 118.249236][ C1] tcp_rcv_established+0x7c/0xf50 [ 118.254248][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 118.260125][ C1] ? ipv4_dst_check+0xc6/0xf0 [ 118.264784][ C1] tcp_v4_do_rcv+0x3b5/0x520 [ 118.269404][ C1] tcp_v4_rcv+0x1c30/0x1e20 [ 118.274030][ C1] ? __read_once_size+0x21/0xe0 [ 118.278897][ C1] ip_protocol_deliver_rcu+0x4d/0x420 [ 118.284267][ C1] ip_local_deliver_finish+0x110/0x140 [ 118.289792][ C1] ip_local_deliver+0x133/0x210 [ 118.294641][ C1] ? ip_protocol_deliver_rcu+0x420/0x420 [ 118.300269][ C1] ip_sublist_rcv_finish+0xf8/0x140 [ 118.305463][ C1] ip_sublist_rcv+0x418/0x550 [ 118.310131][ C1] ? ip_sublist_rcv+0x550/0x550 [ 118.314972][ C1] ip_list_rcv+0x2f5/0x322 [ 118.319376][ C1] ? ip_rcv+0x1a0/0x1a0 [ 118.323527][ C1] __netif_receive_skb_list_core+0x350/0x5c0 [ 118.329509][ C1] ? __read_once_size+0x5a/0xe0 [ 118.334374][ C1] netif_receive_skb_list_internal+0x5d8/0x830 [ 118.340524][ C1] gro_normal_list.part.0+0x3a/0xb0 [ 118.345718][ C1] ? __write_once_size+0x91/0x110 [ 118.350724][ C1] gro_normal_one+0x162/0x170 [ 118.355407][ C1] napi_gro_receive+0x288/0x300 [ 118.360242][ C1] receive_buf+0x284/0x30d0 [ 118.364728][ C1] ? delay_tsc+0x8f/0xc0 [ 118.368963][ C1] ? virtqueue_get_buf_ctx+0x4fd/0x5c0 [ 118.374405][ C1] ? virtqueue_get_buf+0x31/0x40 [ 118.379324][ C1] virtnet_poll+0x436/0x7d0 [ 118.383825][ C1] net_rx_action+0x3ae/0xa90 [ 118.388416][ C1] __do_softirq+0x115/0x33f [ 118.392940][ C1] ? takeover_tasklets+0x250/0x250 [ 118.398059][ C1] run_ksoftirqd+0x46/0x60 [ 118.402463][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 118.407481][ C1] kthread+0x1d4/0x200 [ 118.411564][ C1] ? constant_test_bit.constprop.0+0x30/0x30 [ 118.417529][ C1] ? kthread_unpark+0xe0/0xe0 [ 118.422200][ C1] ret_from_fork+0x1f/0x30 [ 118.428014][ C1] Kernel Offset: disabled [ 118.432341][ C1] Rebooting in 86400 seconds..